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Powdery Mildew Cross Listing

A few of the common powdery mildews and the plants that each can infect are listed here.

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Updated:

November 21, 2023

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Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org

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While some powdery mildews attack a very few specific plants, others have a broad host range and infect many different plants. It is important to recognize this because if a particular powdery mildew is infecting a plant in your nursery or greenhouse, you need to know what other plants might be at risk to the fungus as you decide what plants should be treated with a fungicide.

Host Plant	Golovinomyces chicoracearum	Erysiphe polygoni	Phyllactinia guttata	Sphaerotheca fuliginea	Podosphaera macularis	Podospheara pannosa	Microsphaera penicillata	Podosphaera clandestina	Podosphaera xanthii	Leveillula taurica
Acer			X	X			X
Achillea	X
Aesculus			X
Agastache				X	X
Ageratum	X
Ajuga	X
Alnus			X				X
Amelanchier		X	X					X
Angelonia	X
Antirrhinum	X
Artemesia	X
Aquilegia		X
Asclepias	X		X
Aster	X
Astilbe		X
Baptista		X					X
Begonia	X	X
Berberis			X
Betula			X				X
Bidens	X			X	X
Boltonia	X
Calendula	X	X
Callistephus	X	X
Campanula	X
Capsicum	X
Carica	X
Carpinus			X
Castanea			X
Catalpa			X
Ceanothus		X			X		X
Centaurea	X
Chrysanthemum	X
Clematis		X
Coreopsis	X
Cornus			X		X		X
Corylus			X		X		X
Crassula
Crataegus			X					X
Cosmos	X
Crotalaria		X
Cucumis	X	X		X
Cucurbita	X	X		X					X
Cuphea		X
Dahlia	X	X
Daucus		X
Delphinium	X	X			X
Eucalyptus	X
Euonymus							X
Fagus			X				X
Fragaria			X	X	X
Fraxinus	X		X				X
Gaillardia	X			X	X
Gardenia		X
Gaura		X
Gleditsia							X
Geranium		X		X	X
Gerbera	X			X	X
Geum
Gloxinia	X
Hedera	X
Helenium	X
Helianthus	X	X								X
Heliopsis	X
Heuchera	X		X	X	X					X
Hibiscus	X
Hieracium	X	X
Hydrangea							X
Hypericum	x	X
Iberis
Ilex			X				X
Juglans			X				X
Kalanchoe				X
Kalmia							X
Lactuca	X		X	X
Lagenaria	X
Lamium	X
Leucothoe							X
Liatris	X
Linaria	X
Liriodendron		X	X
Lithospermum	X
Lonicera		X					X
Lupinus		X								X
Lycopersicon		X
Magnolia			X				X
Malus			X	X	X			X
Matricaria	X			X	X
Medicago		X
Mentha	X	X		X	X
Mimulus	X
Monarda	X
Myosotis	X
Nicotiana	X
Oenothera		X
Paeonia		X
Papaver		X
Penstemon	X
Phaseolus		X
Phlox	X			X	X
Pisum		X
Plantago	X		X	X	X
Plantanus							X
Polygonum		X	X
Populus	X	X	X
Potentilla		X		X	X
Primula		X
Prunus			X			X		X
Quercus		X	X				X
Ranunculus		X			X
Rhododendron		X				X	X
Rhus	X		X		X	X
Ribes				X	X
Robinia		X	X
Rosa			X	X	X	X
Rubus			X		X
Rudbeckia	X		X
Rumex			X
Salix
Salvia	X
Sassafras			X
Saxifraga				X	X
Scabiosa		X
Scrophularia	X
Sedum		X
Senecio	X			X	X
Solanum	X
Solidago	X		X	X
Spirea				X	X		X	X
Stachys	X				X
Stokesia	X
Syringa							X
Taraxacum	X		X	X	X
Tiarella				X
Tilia			X				X
Trifolium	X	X					X
Ulmus			X				X
Vaccinium			X				X
Verbascum	X
Verbena	X								X
Veronica				X	X
Viburnum							X
Vigna		X
Viola				X	X		X
Zinnia	X